costume party

Noun

A social gathering of people wearing disguises or costumes, and amusing themselves with dancing, conversation, or other diversions.

Japanese Meaning

仮装パーティー：仮装やコスチュームを身に着けた人々が集まり、踊りや会話、その他の娯楽を楽しむ社交的な集まりです。

We decided to throw a costume party to celebrate the end of the semester.

学期末のお祝いに仮装パーティーを開くことにしました。

Sense（1）

A social gathering of people wearing disguises or costumes, and amusing themselves with dancing, conversation, or other diversions.

costume parties

（ plural ）